guloader | 440b445dc2938b09dc1d5b76d46847b2c7f9892cf2c7b9e99c0aa121a44daa08

Analysis

max time kernel
148s
max time network
153s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
23/09/2024, 23:43

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General

Target

PO320.exe
Size

615KB
MD5

e9fccc1648186d0d9d291b3b481dce31
SHA1

47039fcdd8bb71f4f1bdd6aeeecd2df1cce22adb
SHA256

057ca391a027c4f82e79fcb660fa61c762fab0bc38b14e94bc387b79faaa578f
SHA512

8be8bdaf238981a2817343f4147ef9a9447a02826f2f209940cb5bd5570721b8759350a91c754e9a57661a3b4ffa39fd41c17a7234b5052b9960a2d90dddcee9
SSDEEP

12288:5bt4OfA5VIfIUXR66S1UVvFWOd+qUhQqUWjGKPFA:5buOfAUfIUh654vgshcy

Score

10^/10

guloader discovery downloader persistence

Malware Config

Signatures

Guloader,Cloudeye
A shellcode based downloader first seen in 2020.
downloader guloader

Loads dropped DLL 1 IoCs

pid	Process
940	PO320.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-457978338-2990298471-2379561640-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce\Startup key = "C:\\Users\\Admin\\AppData\\Local\\Temp\\subfolder1\\Fiskemelsfabrikkers192.exe"	PO320.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
940	PO320.exe
1744	PO320.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 940 set thread context of 1744	940	PO320.exe	31

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\automobility.Spa	PO320.exe
File opened for modification	C:\Program Files (x86)\Common Files\borers.Ple85	PO320.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\resources\0409\vivisects\seasons.ini	PO320.exe
File opened for modification	C:\Windows\Fonts\Marines\Hermodactyl202.sup	PO320.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PO320.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PO320.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
940	PO320.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 940 wrote to memory of 1744	940	PO320.exe	31
PID 940 wrote to memory of 1744	940	PO320.exe	31
PID 940 wrote to memory of 1744	940	PO320.exe	31
PID 940 wrote to memory of 1744	940	PO320.exe	31
PID 940 wrote to memory of 1744	940	PO320.exe	31
PID 940 wrote to memory of 1744	940	PO320.exe	31

C:\Users\Admin\AppData\Local\Temp\PO320.exe
"C:\Users\Admin\AppData\Local\Temp\PO320.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Drops file in Program Files directory
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:940
- C:\Users\Admin\AppData\Local\Temp\PO320.exe
  "C:\Users\Admin\AppData\Local\Temp\PO320.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  PID:1744

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

\Users\Admin\AppData\Local\Temp\nsjE35E.tmp\System.dll

Filesize
12KB

MD5
cff85c549d536f651d4fb8387f1976f2

SHA1
d41ce3a5ff609df9cf5c7e207d3b59bf8a48530e

SHA256
8dc562cda7217a3a52db898243de3e2ed68b80e62ddcb8619545ed0b4e7f65a8

SHA512
531d6328daf3b86d85556016d299798fa06fefc81604185108a342d000e203094c8c12226a12bd6e1f89b0db501fb66f827b610d460b933bd4ab936ac2fd8a88

Download Submit
memory/940-11-0x0000000076FC1000-0x00000000770C2000-memory.dmp

Filesize
1.0MB

Download
memory/940-12-0x0000000076FC0000-0x0000000077169000-memory.dmp

Filesize
1.7MB

Download
memory/1744-13-0x0000000001500000-0x000000000485F000-memory.dmp

Filesize
51.4MB

Download
memory/1744-14-0x0000000076FC0000-0x0000000077169000-memory.dmp

Filesize
1.7MB

Download
memory/1744-16-0x0000000000490000-0x00000000014F2000-memory.dmp

Filesize
16.4MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads